Amazingly warm and unexpectedly wind resistant. I wear it for running in the 40-55 degree range but I think with a layer it could work for colder weather. Seems to fit smaller than some Nike stuff -- I most often wear an XL and went up a size.

I'm 6'4 220, slim, long arms. This shirt fits a little snug around the waist but the arm length is great because of the thumb holes. Great for running or working out, and decent for casual use. Zappos was awesome as usual. Upgraded to 1 day shipping and received the item the next day.

Another awesome Nike product. While I have only had this product for a few days, I'm very happy with it so far. I have used it while running in the cold winter temperatures and it definitely keeps me warm once I warm up from running. It fits great, looks great, and performs great.